kamborian



Feb. 28, 1956 J. s. KAMBORIAN 2,736,045

PROGRESSIVE-TYPE CEMENT LASTING MACHINE Filed Aug. 21, 1951 2 Sheets-Sheet l 176x001 Jilfaware'aa 5 ii Z Feb. 28, 1956 J. s. KAMBORIAN 2,736,045

PROGRESSIVE-TYPE CEMENT LASTING MACHINE 2 Sheets-Sheet 2 Filed Aug. 21, 1951 I Ill/0112902" fama 6. Wiz'avz United States Patent PROGRESSIVE-TYPE CEMENT LASTING MACHINE Jacob S. Kamborian, West Newton, Mass. Application August 21, 1951, Serial No. 242,913

29 Claims. (Cl. 12-1) This invention pertains to machines for use in lasting footwear and more especially to lasting machines of the so-called progressive type, the earliest known of which is described in the patent to Kamborian 2,251,284 dated August 5, 1941. in the earliest machines of this type, the lasting margin of the shoe upper is gripped between two helically ribbed rolls turning in opposite directions which feed the work along without interruption while the up-drafting stress is being applied. A reciprocating wiper is used with these rolls for Wiping the tensioned marginal material inwardly over the shoe bottom.

In a later form of the machine the feed rolls are of frusto-conical shape and of opposite taper and the Wiper is a constantly turning element having a helical work engaging rib. The more common practice has been to apply adhesive to the lasting margin or to the shoe bottom, or both, previous to the lasting, although some of the later machines of the above type are equipped to deliver a quick setting adhesive into the lasting zone during the actual lasting. As compared with lasting machines in common use prior to the introduction of the progressive type machine above referred to, the later type of machine is very simple and inexpensive. However, as heretofore devised, a machine of the progressive type includes a wiper of one kind or another, as above noted, separate from the feed rolls, and with means for actuating this wiper and, if, adhesive is supplied, the machine includes a delivery nozzle, independent of the rolls and wiper, whose presence necessitates a substantial spacing of the points at which the work is gripped by the rolls and operatively engaged by thewiper respectively.

In accordance with the present invention, both feed rolls are tapered, as in certain prior machines of this types, but the rolls of the present invention taper in the same direction and are mounted upon shafts which do not lie in the same plane nor intersect. Thus, while one of the rolls has a right conical peripheral surface for contact with the lasting margin, it is necessary, in order to provide a line contact between the rolls (rather than a mere point contact) to provide the second roll with a concave peripheral surface which, due to the relative inclination of the axes of the two rolls, is of approximately hyperbolic curvature.

The axis of this inner, concave roll (which contacts the inner surface of the lasting margin) is inclined steeply with respect to the shoe bottom and in the direction of feed of the work (in substantially customary manner) and the lower end or tip portion of this roll may be shaped to form a button to engage the shoe bottom and to constitute a hold-down. The axis of the right conical outer roll (the latter contacting the outer surface of the lasting margin) is inclined at a relatively low angle to the shoe bottom (for example, an angle approximating that of the axis of the rotary wiper heretofore customarily employed) and this outer roll tapers to a point, as contrasted with the usual prior truncated conical roll. The base or larger end portion of the peripheral surface of this outer roll is knurled or otherwise roughened to provide a good grip on the lasting margin of the upper, while its tapering point is preferably fluted or faceted and of polygonal shape in diametrical section thereby to provide edges which act to toughen the grain surface of the marginal material as the latter is pressed down and wiped in by this conical tip portion of the roll.

By reason of the low angle of the conical roll, the upwardly turning portion of its periphery moves ahnost vertically up from the shoe bottom in approaching the line of contact between the rolls, thus exerting a very powerful tip-drafting action, While the concave roll not only acts as a feed element but also as an-abutment about which the margin of the upper is wrapped and thereby subjected to additional updraft by the inwiping action of the other roll. Preferably the right conical outer roll which comprises the Wiper element is capable of limited axial motion in opposition to a spring, and desirably the shaft, which carries this roll is movable rearwardly, as by a pedal, to separate the rolls for ready introduction of the work between them, although a highly skilled operator can readily introduce the work between the rolls without first separating them.

The invention further contemplates the use of a hollow shaft for the inner or concave roll, with provision for supplying adhesive for delivery through this shaft to a delivery orifice at the lower end of the concavely curved roll so that the adhesive directly enters the lasting zone but without necessitating the employment of an independent nozzle, thus making it possible to arrange the points at which the work is gripped and receives: wiping thrust respectively, very close together. As abovenoted, the inclination of the axes of the rolls is so determined that the stress applied to the margin at the line of tangency of the rolls is substantially parallel to the margin; that is to say, substantially perpendicular to the shoe bottom. As successive increments of the margin are delivered from the rolls, the stressed margin passes downwardly beneath the conical tipped portion of the outer, conical roll and is folded downwardly and pressed into engagement with the bottom of the shoe. At the same time, the faceted tip portion of the conical roll exerts a positive wiping action although with variable contact pressure with the margin, thus avoiding overheating of the marginal material, while at the same time scuffing the surface so as to provide a good anchorage for cement which is later applied in attaching the outer sole.

One object of the present invention is to provide a lasting machine of the progressive type of even simpler construction than prior machines of this type, thereby further to decrease the cost of production, upkeep and operation.

A further object is to provide a lasting machine of the progressive type wherein the work is fed along by a pair of oppositely rotating rolls but in which no separate Wiper or wiper actuating mechanism is required.

A further object is to provide a lasting machine of the progressive type wherein one of the rolls comprises a work gripping element and a wiping element and the other roll constitutes an abutment for the up-drafted lasting margin and, if desired, a delivery nozzle for adhes1ve.

A further object is to provide a lasting machine .of the progressive type having but two upper engaging elements. A further object is to provide a lasting machine of small dimensions and which is. very inexpensive and which requires but little skill or. expenditure of strength on the part of the operator. 7

. A further object is to provide a lasting machine of the easeme- P t i type. av pposed. ork-feeding oll of such complemental shape that the axis of one may be inclined at a relatively slight angle to the bottom of the shoe while the axis of ,the other isinclined at a relatively steep angle to the shoe bottom.

Afurther object is to provide a. lasting machine of the progressive type having two complemental work-feeding rolls and means including a belt drive for turning each respective roll.

A further-object is to provide a lasting machine of the progressive type having two complemental work-feeding rolls and wherein the bearings for the shafts upon which the respective rolls are mounted are relatively stationary.

Qther objects and advantages of the invention will be pointed out in the following more detailed description and byreference to the accompanying drawings wherein Fig. 1 is a fragmentary front elevation of the machine embodying the present invention certain parts being broken away;

Fig. 2 is a fragmentary plan view of the machine shown inFig. 1;

Fig. 3 is a fragmentary section in larger scale than Fig. l on the line 33 of Fig. 1;

Fig. 4 is a fragmentary section in larger scale than Fig. 1pm the line 4-4 of Fig. 1;

Fig. 5 is an end elevation of the combined feed roll and wiper;

Fig. 6 is a side elevation of the roll of Fig. 5; and

Fig. 7 is a diametrical section through the combined feed roll and hold-down.

Referring to the drawings, the numeral 1 designates the upper part of a post or column forming a part of the machine frame. The upper end of this post or column 1 is provided with a bearing portion 2 for a shaft, hereafterdescribcd, and with a laterally and upwardly extending arm 3 having a second bearing portion 4 for a second shaft, indicated by the numeral 5 (Fig. 4).

The shaft 5 is journaled in bushings 6 and 7 fixed within the bearing portion 4 of the frame, these bushings 6 and 7 being spaced apart axially of the shaft so as to leave between them a space within which, according to one desirable embodiment of the invention, there is arranged aheating coil 8, of any desired type, receiving heating currentfrom a suitable source of electrical energy. Above the bushing 6 there is a space or chamber 9 which is closed at its upper end by a screw-threaded cap it}. The delivery end 11-.of an adhesive-supply pipe has screwthreaded engagement with an opening in the wall of this space or chamber 9. It is to be understood that, in accordance with one desirable procedure, adhesive in liquid form will be delivered under pressure through the pipe 11 into the chamber 9. Means for thus delivering adhesive is illustrated, by way of example, in the patent to Kamborian, 2,467,385, April 19, 1949. The lower major portion, at least, of the shaft 5 has an axial bore 12 which I extends down to the extreme lower end of the shaft where it opens to form an adhesive delivery orifice 13. That part of the shaft 5 which is within the chamber 9 is provided with one or more openings 14 reaching into the axial bore 12 and through which adhesive from the chamber 9 may enter the bore 12 and thus flow downwardly for delivery through the orifice 13. The heating coil 8 keeps the adhesive hot and fluent as it passes along theuconduit lltoward the delivery orifice 13.

A work-gripping roll 15, (Fig. 4) is secured to the lower end of the shaft 5, being integral with the latter if desired and as here illustrated. This roll is of downwardly tapering, approximately truncated-conical shape, and preferably has a slightly tapered or convex tip or button 16 at, itslower end which constitutes a hold-down for theiworlc, this button engaging the exposed or upper surface of the shoe bottom during the lasting operation. To

the upper end of the shaft 5 a pulley 17 is fixed. This P lHQY sntb a dby a -b 8 w c isd iv i m any convenient source of power.

Asmay beiseen by comparison of Figs. 1, 2 or 3, the axis of the shaft 5 inclines downwardly and forwardly in the direction of feed of the work. Assuming that the shoe bottom, indicated by the character S (Fig. 1) is substantially horizontal during the lasting operation, the included angle between the axis of the shaft 5 and the shoe bottom is preferably of the order of 45 or more, that is to say, the slope of the axis of the shaft 5, referred to the shoe bottom, is relatively steep. It will also be noted that this shaft 5 inclines inwardly as respects the edge of the shoe bottom, that is to say, if its axis were extended, it wouid intersect the shoe bottom at a point inwardly from the extreme edge of the latter.

Within the bearing member 2 (Fig. 3) there is arranged a hollow shaft 19 which turns in a cylindrical bushing or liner sleeve 24 within the bearing part 2 of the frame. The shaft 19 has a radial enlargement 2i spaced from its lower end which provides a limiting shoulder to prevent undue downward axial movement of the shaft in its bearings. This member Zll engages a washer 22 for example, of organic material, which is held in position by a screw-threaded bushing 23 having threaded engagement with an enlargement of the bearing opening in the part 2. Preferably this bushing 23 is provided with a lining sleeve 24 of anti-friction material. The tubular shaft19-is provided near its lower end with a portion 25 of reduced diameter which is externally screw threaded and which receives an internally screw-threaded cap 26 having a central opening for the passage of the lower end ofa shaft 27. This shaft 27 is coaxial with and arranged within the-lower portion of the tubular shaft 19, and is constrained to turn with the latter by the key 28. The shaft Z'Tis provided with a radial shoulder 29, which by engagement with the cap 26, limits movement of the shaft 27 axially with respect to the shaft 19. A combined work feeding and wiping roll 38 (Figs. 3, 5 and 6) is secured to the lower end of the shaft 27. As here shown, this roll is of substantially right-conical shape, the larger or base portion 31 of this roll, which extends approximately one-half its axial len th, constituting the work gripping portion of the roll while the tapering portion 32, which tapers substantially to a point constitutes the wipingand abrading part of the roll. This smalier end portion-of the roll is provided with substantially flat faces 33 here shown as substantially triangular, the lines of intersection ofadjacent faces forming in effect, lengthwise extending ribs. By reason of the provision of these faces-33, the smaller end portion of the roll may be said to be of pyramidal shape rather than a true cone. However, it is to-be understood that this portion of the roll may have different configurations, if desired. For example, instead of flat faces, it may have ribs extending longitudinally of the conical surface, or it may have a cross-knurled surface, or, under some conditions, it may be a smooth conical surface or even a tapering surface having -a helical rib. In any event, the surface is preferable such that the smaller end portion 32 of the roll not only has a wiping or pressing action, but also an abrasive action such as to roughen the grain surface of the leather of'the lasting margin, thereby to facilitate the connection of the outer sole to the shoe bottom by means of adhesive.

As here illustrated (Figs. 5 and 6), the roll 30 has a tubular tank portion 34;- which receives the lower end of the shaft 27, and to which it is removably secured by set screws or the like. However, this roll 39 may be integral with the shaft, if desired.

The upper end of the shaft 27 is provided with an axial projection 35 of smaller diameter which is received within the lower coils of a compression spring 36 which is housed withint'ne tubular shaft 19 and whose upper end embraces an axial projection 37 formed at the lower end of a spring adjusting member 38 which is externally screw threadedfas shown at 39, for engagement with an internally screw-threaded portion of the tubular shaft 19. The outer end of the member 38 is provided with a knurled head 41 for convenience in turning the part 38 relatively to the shaft 19, the rotation of the member 38 varying the tension of the spring 36. This spring tends at all ,times to move the shaft 27 axially downward relatively to the shaft 19, thereby normally to keep the roll 30 in operative work-gripping relation to the roll 15.

, If desired, provision may be made for moving the shaft 27 upwardly within the bearing 2 against the pressure of the spring so as to separate roll 30 from the roll 15. This may be accomplished by suitable connections (not shown) of a generally conventional type, operative, for example, by a treadle not shown, thus permitting the operator, without removing his hands from the work, to separate the rolls thereby to facilitate the entry of the lasting margin M (Fig. 1) between the rolls and 30.

A pulley 42 is keyed to the upper end of the shaft 19, this pulley having a V-groove in its edge which receives a belt 43 deriving its power from any suitable source. While the pulleys 17 and 42 are here shown as belt driven, it is understood that the shafts 5 and 19 may be turned by any desired means, for example, gearing, but in any event they are rotated in such relative directions that those portions of the peripheral surfaces of both of the rolls 15 and 30, in approaching the line of contact between the rolls, will be moving upwardly, that is to say, away from the shoe bottom. The axis of the shaft 19 is inclined to the horizontal (Fig. 3) at an angle which is relatively low as compared with the angle which the axis of the shaft 5 makes with the shoe bottom. For instance, the angle made by the axis of the shaft 19 with the shoe bottom may be of the order of 20. This shaft 19 has its axis arranged so that the vertical plane of the axis intersects the edge of the shoe bottom at an angle of the order of 80, and so that the axis of the shaft, extended, would touch the shoe bottom at a point substantially spaced from the edge of the latter.

The axes of the rolls 5 and do not intersect each other, that is, they do not lie in the same plane. Thus, if two conical or frusto-conical rolls were employed, the only contact between them would be at a single point. To insure a line contact (which is essential to a firm gripping of the work by the rolls) the downwardly tapering roll 15 (which is of generally truncated conical shape), has a concave peripheral contact surface which in axial section or profile is approximately a hyperbolic curve, the line of tangency or contact between the rolls being substantially as long as the roll 15 and curved, rather than straight.

Referring to Fig. 1, wherein the shoe bottom is indicated diagrammatically and in vertical section by the character S, and the lasting margin is indicated by the character M, it may be noted that by reason of low angle of the axis of the roll 39, the rotation of the latter exerts a very strong, upwardly directed force upon the lasting margin (which is gripped between the two rolls) thereby exerting a powerful, updrafting force for stretching the upper about the last. Upward movement of the shoe bottom is prevented by engagement with the button 16 on the lower end of the roll 15. The action of the roll 30 is such as partially to wrap the margin about the roll 15, which in this respect acts as an abutment, thus providing a substantial component of force acting upwardly and inwardly across the edge of the shoe bottom, so as to advance the lasting margin inwardly toward its wiped-in position. Since the conical tip portion 32 of the roll 30 extends inwardly and across that part of the lasting margin which is being stretched by the updrafting action of the two rolls, the margin is forced inwardly and downwardly against the shoe bottom by the portion 32 of the roll 30. Meanwhile, the ribs between the faces 33 of the portion 30 of the roll act to abrade the exposed surface of the wiped down margin, thus providing a good anchorage for adhesive. As above noted, in accordance with a desirable embodiment of the invention, the shaft 5 and the roll 15 are provided with an axial passage 12 through which adhesive from the chamber 9 flows down so as to be delivered through the port 13 immediately below the upturned lasting margin where the latter is gripped between the rolls. The adhesive is thus delivered directly into the lasting zone and at the best possible position for effective action, and without requiring the employment of a separate nozzle. This avoids the necessity of the spacing of the point at which the upper is gripped by the rolls and the point at which the upper is laid down by the wiper.

While one desirable embodiment of the invention has herein been illustrated by way of example, it is to be understood that the invention is broadly inclusive of any and all modifications falling within the scope of the appended claims.

I claim:

1. A lasting machine of the progressive type wherein the point of application of upper stretching force is progressed uninterruptedly, relatively to a last, along the periphery of the latter, said machine comprising a tapering, rotating wiper and means for supporting the wiper, and a pair of complementary work-engaging rolls, one of which is coaxial with the wiper, and means for turning the rolls in opposite directions.

2. A lasting machine of the progressive type wherein the point of application of upper stretching force is progressed uninterruptedly, relatively to a last, along the periphery of the latter, said machine comprising a tapering, rotating wiper and means for supporting the wiper, the wiper having a faceted peripheral surface operative to wipe down the lasted margin and simultaneously to roughen the exposed surface of the margin, a pair of upper gripping rolls, one of said rolls being coaxial with and fixed to the wiper, and means for turning the rolls in opposite directions.

3. In a lasting machine of the progressive type, a rigid frame having a pair of shaft bearings, a shaft turning in each bearing, the axis of one shaft inclining downwardly in the direction of Work feed and making a relatively steep angle with the horizontal, the axis of the other shaft inclining downwardly and being in a vertical plane which intersects the edge of the shoe bottom, the axis of the latter shaft making a relatively small angle with the horizontal, the axes of the shafts being non-intersecting, a roll fixed to the lower end of each shaft respectively, said rolls being so relatively arranged as to grip the lasting margin of a shoe upper between them, the peripheral surfaces of the rolls being so relatively shaped that they would make a line contact if no work were interposed between them, and means for turning the shafts so that the peripheral surfaces of both rolls move upwardly toward said line of contact.

4. In a lasting machine a pair of work-gripping rolls having cooperating peripheral surfaces, said rolls being mounted on shafts whose axes are non-intersecting and downwardly inclined, the lower part of one roll constituting a hold-down for the bottom of a shoe held thereagainst with the lasting margin projecting upwardly and the second roll cooperating with the first roll simultaneously to feed the work along and to subject it to updrafting force, said stressed margin, after being released from between the gripping rolls, being pressed into engagement with the bottom of the shoe by the second of said rolls acting alone.

5. In a lasting machine of the progressive type, in combination, two cooperating rolls, one of which is designed to contact the inner surface of the lasting margin of the shoe upper and the other of which is designed to contact the outer surface of the lasting margin, the latter roll being of generally right-conical shape and tapering downwardly, the upper or base portion of the periphery of said roll being knurled and the tip portion having longitudinally extending ribs, the roll, first named, which engages the inner surface of the margin having a knurled peripheral portion which, in longitudinal profile, is of concave, and

of. substantially hyperbolic curvature, the-curved surface ofthe latter roll engaging the knurled surface of the conical1roll with a line contact extending substantially from end to end of the concave surface of said first-named roll, and means for driving the rolls in opposite directions.

6. In a lasting machine of the progressive type in combination, two cooperating, downwardly tapering, work-engaging rolls, one of the rolls being of generally right-conical shape, tapering substantially to a point, the base portion'of theperipheral surface of said roll being roughened and the tip portion of said roll having a faceted peripheral surface, the second roll being of generally frusto-conical shape and having a tip designed to contact the bottom of the shoe and to act as a hold-down, the axes of the two rolls being non-intersecting, the axis of the first roll being inclined at a relatively low angle to the shoe bottom and the axis of the second roll being inclined at a relatively steep angle to the shoe bottom, the base portion of the right conical roll cooperating with the peripheral surface of the second roll along a line of contact extending substantially from one end to the other of the latter roll.

7. In a lasting machine of the progressive type, a frame having a pair of shaft bearings, a shaft turning in each bearing, the axis of one shaft inclining downwardly and making an angle with the horizontal exceeding 45, the axis of the other shaft also inclining downwardly but making an angle with the horizontal of substantially less than 45, the axes being non-intersecting, cooperating, work gripping rolls fixed to the lower ends of the respective shafts, the peripheral surfaces of the rolls being so contoured that they would make a line contact if no work were interposed between them, and means for turning the shafts so the peripheral surfaces of the rolls are moving upwardly as they approach the line of contact.

8. In a lasting machine, in combination, a work-gripping roll having a hold-down element at its lower end for engagement with a shoe bottom, the axis of the roll extending downwardly and forwardly in the direction of work advance and making an angle exceeding 45 with the bottom of the shoe, a second work-gripping roll whose axis is inclined to the shoe bottom at an angle substantially less than 45 to the shoe bottom with the vertical plane of the axis of said latter roll intersecting the edge of the shoe bottom at an angle approximating 90, said rolls having complemental peripheral surfaces so shaped as to provide a line contact between them, and means for turning the rolls in opposite directions.

9. In a lasting machine, in combination, a pair of cooperating work gripping rolls whose axes do not intersect and are not parallel, the peripheral surfaces of the rolls being so contoured that they would make a line contact if no work were interposed between them, means for turning the rolls in opposite directions thereby to apply updrafting force to the margin of a shoe upper gripped between them, and a rigid rotating element, coaxial with one of said rolls and turning in timed relation to said roll, operative to abrade the outer surface of the margin of the shoe upper to which updrafting stress has been applied.

10. In a lasting machine in combination, a pair of shafts having non-intersecting axes disposed in different planes, respectively, a work-engaging roll fixed to each shaft, one of said rolls being substantially right conical in shape, the peripheral surfaces of the rolls normally contacting and being so contoured as to provide a line contact between them, and means for turning the shafts in opposite directions.

11. In combination in a lasting machine, two rotary shafts, a pair of drafting rolls, each fixed to one end of one of the rotary shafts, respectively, each roll tapering in diameter toward its free end, one of the rolls engaging the outer surface and the other engaging the inner surface of the lasting margin of the shoe being lasted, that one of said rolls which engages the inner surface ofv the lasting margin having a concave periphery, theperipheral surfaces of the two rolls being tangent along a line lying at an angle to the axis of rotation of one of the rolls, and'means for turning the rolls in opposite directions.

12. In a lasting machine, a pair of drafting rolls having mating circumferential work-engaging surfaces which are tangent along a line inclined to the axis of rotation of one of the rolls and which deviates from a straight line, a pyramidal wiping element, coaxial with and fixed at its base to the end of one of said rolls, and means for rotating the rolls.

13. In a lasting machine of the progressive type, in combination, two complemental, downwardly tapering, workengaging rolls, one of the rolls being of substantially rightconical shape and the other being of generally frusto-conical. shape but havinga concave peripheral surface, the axes of the rolls being'nonintersecting and the peripheral surfaces of the rolls normally making a line contact, shafts to which the respective rolls are fixed, relatively fixed bearings for the shafts, and means for turning the shafts in opposite directions.

14. In a lasting machine, a pair of drafting rolls having cooperating circumferential work-engaging surfaces, said rolls being mounted on non-intersecting, downwardly inclined shafts, means for effecting rotation of the rolls in directions to feed the material between them, the inclination of the axes of said rolls being'such that an up-drafting force is applied to the lasting margin as it passes between them, and a wiper element, coaxial with and fixed to the end of one of said rolls.

15. In a lasting machine, a pair of work-gripping rolls mounted on angularly arranged, downwardly inclined, non-intersecting axes, one of said rolls having a conical peripheral surface and the other a hyperbolic peripheral surface mating with the conical surface of the first roll to provide a line contact, means yieldably urging the mating rolls toward each other, and means for driving the rolls in opposite directions of rotation, thereby concomitantly to updraft the material and to feed the work along.

16. In a lasting machine, a pair of cooperating, downwardly tapering rolls for gripping and applying lasting stress to the lasting margin, one of said rolls being substantially conical and the other having a concave peripheral surface mating with the peripheral surface of the conical roll to provide a line contact with the latter, said roll rotating in a direction opposite to the conical roll, the axes of rotation of the rolls being non-intersecting and so relatively arranged that the rolls exert up-drafting and workfeeding stress.

17. In a lasting machine of the progressive type having a pair of complemental rolls designed to grip the lasting margin of the shoe between their circumferential surfaces, one of said rolls comprising a wiping element, and means for turning the rolls in opposite direction-s.

18. A lasting machine of the progressive type having upper-engaging rolls between which the lasting margin is gripped, one of said rolls having a tapering end portion operative to wipe down the lasting margin, and means for turning the rolls in opposite directions.

19. A combined work-feeding and wiping roll for use in a lasting machine of the progressive type, said roll being of substantially right-conical shape, tapering substantially to a point, the peripheral surface of the larger end of the roll being rough and constituting the work-feeding element of the roll.

20. A combined work-feeding and wiper roll for use in a lasting machine, said roll being of substantially right conical shape and tapering substantially to a point, the peripheral surface of the smaller end portion of the roll having ridges which act to toughen the exposed surface of the lasting margin as the latter is being wiped down by the roll, the peripheral surface of the larger end of the roll being rough and constituting the work-feeding element.

21. In combination, a rotary wiper for use in a lasting machine, said wiper being of right-conicalshape, tapering substantially to a point and having a faceted peripheral 9 surface, and a pair of work-gripping rolls, one of which is coaxial with and rigidly united to the base of the wiper, and means for turning the gripper rolls in opposite directions.

22. In combination, in a lasting machine, a rotary wiper which tapers substantially to a point, the peripheral surface of the wiper consisting of a plurality of substantially flat triangular faces, a pair of cooperating upper gripping rolls, one of which is integral with the wiper and substantially of the same taper as the latter and joined to the larger end of the wiper, and means for turning the rolls in opposite directions.

23. A combined work-feeding and wiping roll for use in a lasting machine of the progressive type, said roll being of substantially right conical shape and tapering substantially to a point, approximately one-half of the length of the roll having a peripheral surface designed to contact the grain surface of the marginal portion of the shoe upper and to remove portions of said grain surface, the roll having longitudinally extending ribs.

24. In a lasting machine of the progressive type having a pair of cooperating rolls designed to grip the lasting margin of the shoe upper between them and to apply updrafting and overdrawing force to the lasting margin, 2. wiper for wiping the drafted margin down against the shoe bottom, that one of said rolls which engages the inner surface of the lasting margin having an axially extending passage, and means for supplying adhesive for delivery from the lower end of said latter roll.

25. A lasting machine of the progressive type having upper-engaging rolls between which the lasting margin is gripped, said rolls being so constructed and arranged as to apply updrafting and overdrawing force to the lasting margin, a wiper for wiping the drafted margin down against the shoe bottom, that one of the rolls which engages the inner surface of the lasting margin tapering downwardly and having a tip portion which acts as a work hold-down by engagement with the shoe bottom, said tip portion having an axial delivery orifice, and means for supplying adhesive for delivery through said orifice.

26. A lasting machine of the progressive type comprising two upper-engaging, oppositely turning rolls, said rolls having cooperating peripheral surfaces between which the lasting margin of the upper is gripped, one of the rolls having a portion which acts to wipe down the margin and the other roll having a delivery orifice at its lower end, and means for supplying adhesive for delivery to said orifice.

27. In a lasting machine of the progressive type, two oppositely rotating rolls designed to engage opposite surfaces, respectively, of the lasting margin of the shoe, each roll tapering downwardly, the upper end portion of the peripheral surface of that roll Which engages the outer surface of the lasting margin being knurled and the lower end portion of said surface being faceted, the roll which engages the inner surface of the lasting margin having an axial passage, and means for supplying adhesive to said passage for delivery from the lower end of said roll into the lasting zone.

28. In combination in a lasting machine having means for applying updrafting force to the margin of a shoe upper and wipingmeans for applying inwiping force to the drafted margin, said Wiping means comprising a roll of polygonal transverse section Whose axis extend-s transversely of the width of the wiped-in margin and intersects the edge of the shoe bottom at an angle approximating and means for rotating said roll.

29. In combination in a machine for lasting footwear, means for applying lasting stress to the margin of a shoe upper comprising a rotary gripper element engageable with the outer surface of the lasting margin, said rotary gripper element having a work-engaging surface designed to advance the work and a second gripper element engageable with the inner surface of the lasting margin, a wiper element which rotates about the same axis as said first named rotary gripper element, said wiper element having a work-engaging surface designed to apply a stress to the margin in the plane of the bottom substantially at right angles to the feeding force applied by the rotary gripper element and means operative to turn said first named gripper element and the Wiper element simultaneously at the same angular velocity.

References Cited in the file of this patent UNITED STATES PATENTS 2,028,831 Hadaway Jan. 28, 1936 2,271,612 Ashworth Feb. 3, 1942 2,314,047 Kamborian Mar. 16, 1943 2,446,043 Christiansen July 27, 1948 2,455,694 Miller Dec. 7, 1948 2,466,818 MacKenzie Apr. 12, 1949 2,599,645 Knowlton June 10, 1952 2,618,793 Miller Nov. 25, 1952 2,655,671 Fossa Oct. 20, 1953 

